package cn.touna.jss.util;

import org.apache.commons.codec.digest.DigestUtils;
import org.junit.Test;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;

public class MD5Utils {

    private static final String hexDigits[] = {"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f"};

    private static String byteToHexString(byte b) {
        int n = b;
        if (n < 0)
            n += 256;
        int d1 = n / 16;
        int d2 = n % 16;
        return hexDigits[d1] + hexDigits[d2];
    }


    public static String byteArrayToHexString(byte b[]) {
        StringBuffer resultSb = new StringBuffer();
        for (int i = 0; i < b.length; i++)
            resultSb.append(byteToHexString(b[i]));

        return resultSb.toString();
    }

    public static String MD5Encode(String origin, String charsetname) {
        String resultString = null;
        try {
//            resultString = new String(origin);
            MessageDigest md = MessageDigest.getInstance("MD5");
            if (charsetname == null || "".equals(charsetname))
                resultString = byteArrayToHexString(md.digest(origin.getBytes()));
            else
                resultString = byteArrayToHexString(md.digest(origin.getBytes(charsetname)));
        } catch (Exception exception) {
        }
        return resultString;
    }

    @Test
    public void Test1() throws UnsupportedEncodingException {
        String src = "datetime=1524799630492&identity=350124198003015156&name=杨为涛&phone=13329561759&reqid=061f94600eb44ecbbed071cc0138c89b&service_id=1001&sign_type=1&sp_no=1300121327&key=23d177a9affd5e9fddee082c55985b89bcb0c9da";
        String md5Str = DigestUtils.md5Hex(src);
        System.out.println(md5Str);
        md5Str = DigestUtils.md5Hex(src.getBytes("UTF-8"));
        System.out.println(md5Str);
    }

}
